In the Thursday Washington Post, the Minneapolis all-news radio station owned by Robert Short was incorrectly identified as WTTC. The correct call letters was WWTC.

Robert E. Short, a millionaire truckline and hotel operator who last month purchased WTTC, Minneapolis' only all-news radio station, as ordered its 20-member news staff to make it an all-sell station, too.

Short, in short, has directed the news staff to join the five-member sales staff "in a common . . . effort" to sell commercials in order to improve "the dreadful financial picture." The commission is 10 percent.

Short, remembered in Washington as the controversial proprietor of the now departed Washington Senators baseball club, bought WTTC for $600,000 last month.

Yesterday he said he couldn't afford for the station to lose money at what he said was the current rate of up to $20,000 a month. Some of the staff will reportedly quit rather than hustle advertising.

"We don't have any Cronkites over there," said Short yesterday. "I don't want anyone to work for me who thinks he's so high and mighty that he can't put his shoulder to the wheel."

Earlier, when the all-sell policy was started, Short conceded some questions had been raised about a conflict between reporting news and selling commercials for news programs. But he added at that time, "Common sense would indicate that any such suggestion is patently fallacious on its face."

He added that the radio station's lawyer and the management of two of its major competitors "confirmed the common sense theory," when asked. He said the idea might be new in the Minneapolis-St. Paul market but it was not new in "many other markets," and was a good solution to the many problems confronting the management and employes of Metropolitan Radio Inc., the corporate name of the station.

Short, who has also been involved in the political picture here, particularly as a fund-raiser for the late Sen. Hubert H. Humphrey, is a maverick candidate for the remaining four years of the seat held now by Humphrey's widow, Muriel. Short will face Rep. Donald Fraser (D-Minn.), the endorsed candidate, in the September primary.

In a separate edict last month, Short posted a bulletin board notice that said: "Be advised that I do not expect, nor will I accept, any special privilege from the staff of WTCC, in relationship to my campaign for election to the U.S. Senate."

He said that he bought the station May 16 under a contract executed long before he had any intention of running for the Senate.